  /* 搜索框样式 */
        .search-container {
            margin-right: 15px;
        }
        
        .search-box {
            position: relative;
            background: var(--card-bg);
            height: 40px;
            border-radius: 40px;
            padding: 10px;
            display: flex;
            align-items: center;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }

        .search-box:focus-within {
            box-shadow: 0 0 0 2px rgba(74, 107, 255, 0.3);
        }

        .search-btn {
            color: var(--primary-color);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: transparent;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: 0.4s;
            text-decoration: none;
            border: none;
            cursor: pointer;
            flex-shrink: 0;
        }

        .search-btn:hover {
            background: rgba(74, 107, 255, 0.1);
        }

        .search-txt {
            border: none;
            background: none;
            outline: none;
            color: var(--text-primary);
            font-size: 15px;
            transition: 0.4s;
            line-height: 40px;
            width: 0;
            padding: 0;
            flex-grow: 1;
        }

        .search-box:hover .search-txt,
        .search-txt:focus {
            width: 200px;
            padding: 0 6px;
        }

        .btn {
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            border: none;
            font-size: 15px;
        }

        .btn-login {
            background: transparent;
            color: var(--primary-color);
            border: 1.5px solid var(--primary-color);
        }

        .btn-login:hover {
            background: rgba(74, 107, 255, 0.1);
        }

        .btn-register {
            background: var(--gradient);
            color: white;
            box-shadow: 0 4px 10px rgba(74, 107, 255, 0.3);
        }

        .btn-register:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 14px rgba(74, 107, 255, 0.4);
        }